Label the following properties as either physical or chemical. Writ a p next to the physical properties and c next to chemical properties
95 POINTS!!!
Answers
Answer:
A: Chemical
B: physical
C: physical
D: Chemical
E: Physical
Answer:
A: Chemical
B: physical
C: physical
D: Chemical
E: Physical
Explanation:
Related Questions
how does activation energy affect the process of a reaction
Answers
Answer:
The activation energy increases how quickly the reaction will progress.
Explanation:
The activation energy of a chemical reaction is intimately linked to its rate. Particularly, the greater the activation energy, the slower the chemical reaction will be. The reason is: molecules can only finish the reaction as soon as they have reached the peak of the activation energy barrier. Many reactions possess such huge activation energies that they practically don't advance at all without an input of energy.
The activation energy of a particular reaction determines the rate at which it will proceed. The higher the activation energy, the slower the chemical reaction will be.
What element has the electron configuration 1s22s22p63523p64523d4?
A.Chromium (Cr)
B.Magnesium (Mg)
C.Manganese (Mn)
D.Iron (Fe)
Answers
Answer:
B.Magnesium(Mg)
Explanation:
maybe
a reaction has a rate constant of 0.0735 sec-1, how much of the compound (in mol/l) is left after 3.96 sec, if there was 0.969 mol/l at the start?
Answers
After 3.96 seconds, 0.549 mol/l of the compound is left. The rate constant of a reaction indicates how quickly reactants are being converted into products.
In this case, a rate constant of 0.0735 sec-1 means that 0.0735 moles of the compound react per second. To determine how much of the compound is left after 3.96 seconds, we can use the following equation:
ln([A]/[A]₀) = -kt
Where [A] is the concentration of the compound at time t, [A]₀ is the initial concentration (0.969 mol/l), k is the rate constant (0.0735 sec-1), and t is time (3.96 seconds).
Solving for [A], we get:
[A] = [A]₀ e^(-kt)
Plugging in the values, we get:
[A] = 0.969 mol/l e^(-0.0735 sec-1 * 3.96 sec)
[A] = 0.549 mol/l
Therefore, after 3.96 seconds, 0.549 mol/l of the compound is left.
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How can resistance exercise affect nitrogen balance? 0 words entered.
Answers
Resistance exercise can impact nitrogen balance by promoting an increase in muscle protein synthesis and reducing muscle protein breakdown. This results in a positive nitrogen balance, indicating that the body is retaining more nitrogen than it is excreting.
Resistance exercise stimulates muscle protein synthesis, which is the process of creating new proteins in muscle cells. This increase in protein synthesis requires a positive nitrogen balance, as proteins are composed of amino acids, and nitrogen is an essential component of amino acids. During resistance exercise, the body adapts to the increased demand by enhancing the rate of muscle protein synthesis.
Additionally, resistance exercise also reduces muscle protein breakdown. By engaging in resistance training, the body signals a need to preserve muscle tissue, leading to a decrease in muscle protein breakdown.
The combination of increased muscle protein synthesis and reduced protein breakdown results in a positive nitrogen balance, indicating that the body is retaining more nitrogen than it is losing. This is important for muscle growth and adaptation to resistance training.
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Because they have aromas, compounds with a ring of resonance bonds are called –
A) fragrent compounds
B) pungent molecules
C) aromatic compounds
D) scented structures
Answers
Answer:
the answer is Fragrent compounds
what is the equation of CH3-CH=CH2 + Cl2 →
Answers
Answer: CH3CHClCH2Cl
Explanation:Equation is already balanced
Your answer is partially correct. What factors must you consider to determine the sign of AS for the reaction 2N2O(g) → 2N2(g) + O2(g) if it occurs at constant temperature? Select all that apply. (a) the number of moles of products versus reactants: in this case the number of moles increases (b) the number of moles of products versus reactants: in this case the number of moles decreases (c) the state of the products versus reactants (d) the complexity of the molecules: N2O is more complex than either N or O2 (e) the complexity of the molecules: N2O is less complex than either N2 or 02 (f) the total number of valence electrons: N2O has more valence electrons than N2 and O2 (g) the total number of valence electrons: N20 has less valence electrons than Nz and O2 AS is expected to be positive
Answers
To determine the sign of ΔS for the reaction \(2N_{2}O (g)\) → \(2N_{2} (g)\) + \(O_{2} (g)\) at a constant temperature, you should consider the following factors (a), (c), and (d).
(a) The number of moles of products versus reactants: in this case, the number of moles increases. This is because the reaction goes from 2 moles of reactants (\(2N_{2}O (g)\)) to 3 moles of products (\(2N_{2} (g)\) + \(O_{2} (g)\)). An increase in the number of moles generally leads to an increase in entropy, making ΔS positive.
(c) The state of the products versus the reactants: in this case, both products and reactants are in the gaseous state, so there is no significant change in entropy due to a change in state.
(d) the complexity of the molecules: \(N_{2}O\) is more complex than either N or \(O_{2}\)
To sum up, the factor to consider for determining the sign of ΔS for the given reaction is (a), (c), and (d)
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Sandwich that stays fresh for 7 years, other ‘neutraceutical’ wonders
In a laboratory outside Zurich in Switzerland, a food scientist engages in "creative appraisal" of natural food flavors. An example: a real banana having 225 natural flavor components can be duplicated with artificial alternatives using only nine ingredients.
The same company has now in store 20,000 synthetic varieties of flavor, 200 for strawberry alone. Givaudan, the Swiss firm, is the world’s biggest flavorings manufacturer and supplies one in every five artificially flavored foods in the world.
Artificial? "We prefer to call them "nature identical chemicals," says Dr. Heini Menzi, vice president for European research of Givaudan.
These days, emerging groups of professionals in some countries – food scientists they are called – are enmeshed in laboratory work. They are engaged in an awesome venture of working on "industrialized solutions" to maximize manufacturers’ profits and give more nutritional and medical benefits to consumers.
Their sustainable goal is to extend the shelf-life of food items. Manufacturers are enthusiastically pouring so much money to encourage new technologies designed to keep food fresher for a longer time. One of those already attracting interest is a ready-to-eat sandwich that will stay edible after seven years!
The technique is to expose the product to a safe level of radiation using gamma rays. Irradiation kills bacteria, like salmonella and E. coli, and also prevents vegetables from sprouting, hence augmenting an extended fresh-look appearance of the produce. The other is by pulsed electric field technology which subjects fresh foods to bursts of high-voltage electricity.
Directions. Write T if the statement is TRUE and F, if FALSE.
1. Bursts of high-voltage electricity kill bacteria such as E. coli and salmonella.
2. It is possible for food scientists to copy the flavor of natural foods.
3. The shelf-life of food refers to the price of the product indicated on the shelf
4. The other name that scientists give to artificial flavor components is nature identical chemicals.
5. Givaudan has produced 300 synthetic flavors for a real banana.
6. Bacteria like salmonella and E. coli extend the shelf-life of food.
7. Food manufacturers want to extend food freshness to serve consumers and to raise profits.
8. Pulsed electric field technology gives food a fresher look even for a long time.
9. All synthetic flavors are natural.
10. Irradiation exposes a product to an acceptable level of gamma ray radiation.
11. A banana has 200 natural food flavors.
12. A Swiss firm called Givaudan supplies the world with irradiated food.
13. Fresh foods exposed to bursts of high-voltage electricity stay fresh longer14. Food companies spend much for researches that look for ways to make food last longer.
15. Dr. Heinz Menzi is the vice president of Zurich
Answers
The validity of the statements are as follows:
1. True
2. True
3. False
4. True
5. False
6. False
7. True
8. True
9. False
10. True
11. False
12. False
13. True
14. True
15. False
Food scientists are using techniques such as irradiation and pulsed electric field technology to extend the shelf-life of food, while artificial flavors can be created to mimic the taste of natural foods, as done by Givaudan, the world's largest flavorings manufacturer.
Here are the correct responses to the statements:
1. True: Bursts of high-voltage electricity can kill bacteria such as E. coli and salmonella.
2. True: Food scientists can copy the flavor of natural foods using artificial alternatives.
3. False: The shelf-life of food refers to how long the product can be stored before it becomes unfit for consumption, not the price.
4. True: Scientists refer to artificial flavor components as "nature identical chemicals."
5. False: The statement mentions that Givaudan has produced 200 synthetic flavors for strawberry, not 300 flavors for a real banana.
6. False: Bacteria like salmonella and E. coli are harmful and can cause food spoilage, so they do not extend the shelf-life of food.
7. True: Food manufacturers aim to extend food freshness to serve consumers and increase profits.
8. True: Pulsed electric field technology can give food a fresher appearance even for an extended period.
9. False: Synthetic flavors are not inherently natural; they are artificial.
10. True: Irradiation involves exposing a product to an acceptable level of gamma ray radiation.
11. False: A real banana has 225 natural flavor components, not 200.
12. False: The Swiss firm Givaudan is the world's biggest flavorings manufacturer but does not exclusively supply irradiated food.
13. True: Fresh foods exposed to bursts of high-voltage electricity can stay fresh longer.
14. True: Food companies invest significant funds in research to find ways to prolong the shelf-life of food.
15. False: The name of the vice president mentioned is Dr. Heini Menzi, not Dr. Heinz Menzi. The location mentioned is outside Zurich, not specifically in Zurich.
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is this won true or false In Earth’s atmosphere, cold air rises and warm air rises. i think it is true becouse of Earth’s atmosphere is cold and hot
Answers
Answer:
False
Explanation:
Heat rises, but cold air doesn't. Cold air is heavier than warm air is.
How many atoms are there in a 2 moles of oxygen atoms?
Answers
Explanation:
Solution — 1 molecule of O2 = 2 oxygen atoms So, 1 mole of O2 = 2 mole oxygen atoms = 2 × 6.022 × 1023 = 12.044 ×1023 oxygen atoms.
Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 1.2044 ×10²⁴ oxygen atoms are there in a 2 moles of oxygen atoms.
What is mole?The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.
Mathematically,
number of mole of O\(_2\)= 2 mole
number of atoms/molecules=number of moles × 6.022×10²³(Avogadro number)
substituting all the given values in the above equation, we get
number of oxygen atoms = 2 × 6.022 × 10²³
number of oxygen atoms= 1.2044 ×10²⁴ oxygen atoms.
Therefore, 1.2044 ×10²⁴ oxygen atoms are there in a 2 moles of oxygen atoms.
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A 15.0 ml sample of gas at 10.0 degree Celsius and 760 torr changes to a pressure of 1252 torr at 35.0 degree Celsius. What is the volume of the gas?
Answers
Answer:
9.91 mL
Explanation:
Using the combined gas law equation as follows;
P1V1/T1 = P2V2/T2
Where;
P1 = initial pressure (torr)
P2 = final pressure (torr)
V1 = initial volume (mL)
V2 = final volume (mL)
T1 = initial temperature (K)
T2 = final temperature (K)
According to the information provided in this question;
V1 = 15.0mL
V2 = ?
P1 = 760 torr
P2 = 1252 torr
T1 = 10°C = 10 + 273 = 283K
T2 = 35°C = 35 + 273 = 308K
Using P1V1/T1 = P2V2/T2
760 × 15/283 = 1252 × V2/308
11400/283 = 1252V2/308
Cross multiply
11400 × 308 = 283 × 1252V2
3511200 = 354316V2
V2 = 3511200 ÷ 354316
V2 = 9.91 mL
Which of the following represents a process in which a species is reduced?
a) Ca(s) - Ca2+ (aq)
b) Hg() - Hg22+(aq)
c) Fe2+(aq) - Fe3+(aq)
d) NO3 (aq) - NO(9)
e) 5032 (aq) - S04- (aq)
Answers
Answer:
D
Explanation:
Option D is the right answer. A substance that has been reduced undergoes chemical reduction. They show the following properties;
Removal oxygen from the species. Option D goes from 3 oxygen to just 1 oxygen. Addition of hydrogen to a specie. Gain of electrons by an atom. Decrease in oxidation number of an atom. Decrease in the number of electronegative atoms surrounding an element in changing from reactants to products.The equation that represents the process of reducing a specie is : ( D )
NO₃ (aq) - NO(g)
The reduction of a specie is a chemical reaction process which involves the removal of oxygen atom(s) and the the addition of hydrogen.
A reduced specie gains/accepts electrons therefore becoming more electronegative ( i.e. the number of electronegative atoms around it is reduced ) and It also experiences a decrease in its oxidation number
From the options provided the number of oxygen present in NO₃ reduces from O₃ to O This makes option D the correct option representing the reduction of specie
Hence we can conclude that the The equation that represents the process of reducing a specie is
NO₃ (aq) - NO(g)
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4 Al(s) + 3 O2(g) --> 2Al2O3 (s) What mole ratio would you use to convert from the given quantity of moles of aluminum to the wanted unit of moles of aluminum oxide?
Answers
Answer:
1:2
Explanation:
For every 4 moles of aluminum, there are 2 moles of aluminum oxide, so the mole ratio when converting from aluminum to alunmimum oxide is
2 moles aluminum oxide:4 moles aluminum. This can be simplified to 1:2.
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The John Amos power plan located in Winfield, WV is a coal fired plant. The combustion of coal results in the emission of sulfur dioxide (SO 2
) into the atmosphere. SO 2
is known to cause respiratory illness and is a component of acid rain. Regulators are attempting to determine an efficient level of pollution. The following information is provided, the marginal damage costs (MDC) and marginal control costs (MCC), where Q= hundreds of tons of SO 2
and all costs are measured in hundreds of dollars. MDC=20Q
MCC=400−5Q
a. Determine the efficient quantity of SO 2
that should be released. b. Draw a model that represents the MDC and MCC. Include the efficient quantity and label the areas of total costs for damages and control.
Answers
The efficient quantity of SO2 emissions that should be released from the power plant is 16 hundred tons.
The efficient quantity of SO2 emissions that should be released from the John Amos power plant can be determined by equating the marginal damage costs (MDC) and marginal control costs (MCC). In this case, the MDC is given by 20Q (where Q is the quantity of SO2 emissions in hundreds of tons), and the MCC is given by 400 - 5Q.
To find the efficient quantity, we set MDC equal to MCC:
20Q = 400 - 5Q
Simplifying the equation, we get:
25Q = 400
Dividing both sides by 25, we find:
Q = 16
Therefore, the efficient quantity of SO2 emissions that should be released from the power plant is 16 hundred tons.
In the model representing MDC and MCC, the x-axis represents the quantity of SO2 emissions (Q in hundreds of tons), and the y-axis represents the cost (in hundreds of dollars). The MDC curve is upward-sloping, starting from the origin and increasing at a constant rate of 20. The MCC curve is downward-sloping, starting at 400 and decreasing at a constant rate of 5. The efficient quantity of 16 is labeled on the x-axis.
The areas of total costs for damages and control can be identified on the graph. The area under the MDC curve represents the total cost of damages caused by the emissions, while the area under the MCC curve represents the total cost of implementing control measures to reduce the emissions. The goal is to minimize the sum of these costs, which is achieved at the point where the MDC and MCC curves intersect, corresponding to the efficient quantity of emissions.
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how many parts does the eukaryotic cell have in total
if u answer correctly u will get 20 points
Answers
Answer:
3 parts
Explanation:
Eukaryotic cells have 1) a membrane-bound nucleus; 2) numerous membrane-bound organelles and 3) several, rod-shaped chromosomes.
A. Mechanical waves
B. Infrared waves
C. Light waves
D. Electromagnetic waves
Answers
uwu
What is the oxidation state of each element in K2Cr2O7?
What is the oxidation state of each element in SO32
Answers
The oxidation state of each element in \(K_{2}Cr_{2}O_{7}\) is K: +1; Cr: +6; O: -2. The oxidation state of each element in \(SO_{3}^{2-}\) is: S: +4; O: -2.
How to find Oxidation States of Elements?
The oxidation state of each element in \(K_{2}Cr_{2}O_{7}\) is as follows:
1. Potassium (K): +1
2. Chromium (Cr): +6
3. Oxygen (O): -2
To find these oxidation states, remember that the overall charge of the compound must be equal to zero. First, assign known oxidation states for elements, such as +1 for K and -2 for O. Then, use the formula 2(K) + 2(Cr) + 7(O) = 0 to solve for Cr, which gives you +6.
The oxidation state of each element in \(SO_{3}^{2-}\) is:
1. Sulfur (S): +4
2. Oxygen (O): -2
For \(SO_{3}^{2-}\) , the overall charge is -2. Oxygen's oxidation state is -2. Use the formula (S) + 3(O) = -2 to solve for S, which gives you +4 for the oxidation state of Sulfur.
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Fischer Projections of L- and D-threonine
a. Identify the functional groups in the Fischer projection of L-threonine.
Answers
The alkyl group (R) attached to the chiral α-carbon of L-threonine amino acid is H₃C-CH-OH. The Fischer projection of L-threonine is attached below.
What is an amino acid?Amino acids can be defined as organic compounds that contain both amino and carboxylic acid functional groups. Most amino acids are α-amino acids, which comprise proteins.
Amino acids are divided according to the positions of the functional groups, such as alpha- (α-), beta- (β-), gamma- (γ-), or delta- (δ-) amino acids. As proteins, amino acids form 2nd largest component of human muscles and tissues.
In the structure of amino acids, R denotes a side chain attached to each amino acid. The carbon atom attached to the carboxyl group (-COO) is called the α–carbon. Amino acids with an amino group (-NH₂) attached directly to the alpha-carbon is known as α-amino acids.
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Complete the sentence. _______ have the information to build proteins.
Select one:
Segments of nucleotides called genes
Segments of DNA called RNA
Segments of DNA called genes
Segments of nucleotides called RNA
Answers
Answer:
Segments of DNA called RNA.Good luck dude
______ and _______ factors can affect in an organisms traits.
Answers
Answer:
Environmental factors such as diet, temperature, oxygen levels, humidity, light cycles, and the presence of mutagens can all impact which of an animal's genes are expressed, which ultimately affects the animal's phenotype.
Explanation:
Addition of _____________ to pure water causes the least increase in conductivity
Answers
organic molecules
because organic molecules does not dissociate in water
Acidic
A) is an excess of OH-
B) is an excess of H+ ions
C) when alkali dissociate, anion
D) is the division of chemistry that deals with the transfer of electric charge in chemical reactions
E) loss of electrons yielding a positively charged ion
Answers
An acidic solution can be defined as one that has an excess of H+ ions .So the correct option is option B.
Acidity is a property of a substance that describes its ability to donate hydrogen ions (H+). A substance with a high concentration of H+ ions is considered acidic. In aqueous solutions, the concentration of H+ ions is balanced by the concentration of hydroxide ions (OH-). When the concentration of H+ ions is greater than the concentration of OH- ions, the solution is acidic.
Option A is incorrect because an excess of OH- ions in a solution makes it basic or alkaline, not acidic.
Option C is incorrect because the anion is not directly related to acidity. An anion is a negatively charged ion that is formed when an atom gains one or more electrons.
Option D is incorrect because electrochemistry deals with the transfer of electric charge in chemical reactions. Acidity is a broader concept that involves the concentration of H+ ions in a solution.
Option E is incorrect because the loss of electrons yielding a positively charged ion is called oxidation, which is not directly related to acidity.
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how much force is required to accelerate an 1,800 kg truck at 3 m/s/s
Answers
Explanation: divide 3 m/s/s by 1,800 kg to get 600 N
Answer:
3 ÷1,800
= 600 N
Thus the force needed is 600N
The specific heat capacity of silver is 0.24 J/g °C. How many joules of energy are needed
to warm 0.500 g of silver from 25.0°C to 27.5°C?
Answers
Answer:
0.3 J
Explanation:
The equation for heat capacity is Q = mcΔT where Q is the heat, m is the mass of the substance, c is the specific heat capacity of the substance and delta T is the change in temperature. Plugging those values into the equation, we have Q = (.500)(0.24)(27.5-25) = 0.3
What happens to PH of basic solution as you add water
Answers
Answer:
to fall towards 7, making the solution less alkaline as more water is added.
Fossil fuels are made up of
A. aromatic hydrocarbons
B. acids
C. hydrocarbons
D. optical isomers
Answers
Answer:
I think its option C
Explanation:
Answer:
C. Hydrocarbons
Explanation:
I think it is C
Calculate the wavelength (m) of light that has a frequency of 2.17 × 10^11 s-1
a) 1.38*10^-3
b) 6.51*10^19
c) 1.44*10^-22
d) 1.44*10^22
e) 1.38*10^3
f) none of the above
Answers
Answer:
e
Explanation:
wavelength = speed of light/frequency
wavelength = 3 x 10^8/2.17 x 10^11
wavelength = 1.38x10^-3m
what does Le châteliers principle state?
Answers
Hope this helps!
Based on this passage, do you think our stress response system helps or hurts people in their everyday lives? Use evidence to support answer.
Answers
The fight-or-flight response, often referred to as the stress response system, is a physiological reaction to stress or danger that primes the body to react to a perceived threat.
How can the stress reaction work for you?Stress reactions help your body acclimatise to unfamiliar environments. A stress response, for instance, may cause your body to work harder and keep you up longer if you have a huge test coming up.
What impact does our perspective on stress have on the stress response?Being "stressed about the stress" would likely worsen both the physiological effects of stress as well as the perception of stress, similar to how anxiety spirals because of "anxiety about the anxiety."
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Nobelium-254 has a half life of 3 seconds. How many half-lives would have to occur to
reduce a 15g sample down to 0.09375g?
Answers
the number of half-lives that would have occur to reduce a 15 g sample of Nobelium-254 down to 0.09375 g is 7.3
To calculate the number of half-lives that would have occur to reduce a 15 g sample of Nobelium-254 down to 0.09375 g, we use the formula below.
Formula:
2ⁿ = R/R'........... Equation 1Where:
n = Number of half-lives that have occuredR = Original mass of Nobelium-254R' = Mass of Nobelium-254 after decayFrom the question,
Given:
R = 15 gR' = 0.09375 gSubstitute these values into equation 1
2ⁿ = 15/0.093752ⁿ = 160n = log160/log2n = 7.3 half-livesHence, the number of half-lives that would have occur to reduce a 15 g sample of Nobelium-254 down to 0.09375 g is 7.3
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